Preliminary Experiments to Determine Scale and Slip-Stream Effects on a 1/24th Size Model of a JN4H Biplane
This is a 1923 NACA-era technical report of preliminary wind-tunnel and flight experiments on a 1/24th scale model of a JN4H biplane, published for aeronautical engineers and researchers. The pictures are engineering graphs: curves plotted on gridded axes for drag coefficient, lift and drag ratios, and slip-stream velocity against angle of attack, drawn in plain black lines with dashed and solid variants, suggesting a designer might borrow the clean grid-and-curve layout for technical infographics.
